"We absolutely respect the recommendations from the FDA, but they are only recommendations not laws," Cheesborough said. "We offera waiver that explains what DHA is andbelieve it is completely safe."

Hollywood Tans andthe leadingmakers of spray tan cabins point to a2010 study by theEuropean Commission that concluded di-hydroxy-acetone "does not pose a risk to the health of the consumer."

With limited studies in the U.S., Dr. Reddy is inclined to agree at this point.

"This is definitely a new use for DHA, and we need to do more research, but at this point I think it is safein limited amounts and the right settings," she said. "It isprobably OK forpeopleto continue spray tanning,but it's probably not meant to be done in excess."

A number of dermatologists 11Alive News contacted are quick to add that achieving a tan using lotions or sprays is still much safer than sunbathing outdoors.